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[" 84.If "A" and "B" are the sums of odd...

[" 84.If "A" and "B" are the sums of odd amd even terms "],[" respectively in the expansion "(x+a)^(n)" then "],[(x+a)^(2n)-(x-a)^(2n)" is equal to "],[[(A)A(A+B)," (B) "4(A-B)],[" (C) "AB," (D) "4AB]]

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